Features APP EDITABLE: The content on the screen of this LED Hats can be freely edited through your mobile APP, which is ideal for outdoor concerts, baseball, carnival, Christmas, bars, clubs, holiday parties, Halloween and more. REMOVABLE SCREEN: If you do not want your Programmable LED Cap to display text, you can turn off the power and use it as a regular hat. And the LED screen can be removed for use elsewhere. COTTON MATERIAL: This LED smart hat is made of cotton fabric and is comfortable to wear. The top is thickened, which is not easily deformed or collapsed, and will not affect the appearance of the hat. SIZE ADJUSTABLE: There is a reasonable adjustment buckle at the back of the LED hats. You can adjust according to the size of your head. No need to worry about the hat being too big. SIMPLE TO USE: Download the APP on your phone, press and hold the power button to activate the LED screen, and connect to the bluetooth hotspot on your phone , you can start edit your LED hats. Specification: Item Type: LED Cap Material: Cotton Battery: 1 x 602040 Polymer Lithium Battery 450mAh (Built in) APP: For SPOTLED APP Connection Method: Bluetooth Package List:1 x LED Cap1 x USB Cable Package List 1 x LED Cap 1 x USB Cable